In order to stop the invasion of the demons and seal the evil god which has been resurrected after a thousand years, Grey embarks on a journey together with his sister, Fiona, and his comrades. At the end of their journey, they were facing the evil god, and all of his comrades including his little sister were killed because of the evil god.Being the only survivor of the journey, Grey was hailed as a hero and was granted the throne as the emperor of the holy empire, gaining glory and authority. Unfortunately, Grey couldn’t recover from the grief of losing his one and only sister, and decided to use any means necessary to revive her. After countless attempts to try and revive his sister, Grey became hopeless, until he heard a mysterious voice saying,After making a deal with the mysterious voice,Grey found himself standing in his hometown that was supposed to be destroyed by the invasion of the demons…

A beginner who was once ranked number one in the world."Prophecy Online" is what is known as a scam game. It was said that those who managed to clear it will be able to obtain unlimited wealth, and the protagonist, Endou Rei, believed in those words and risked his life to challenge the game.However, what awaited him after clearing the game was its end of service, and a remaining balance of 3,584 yen. Rei wallowed in despair, thinking that it was all over, but… just a week later, the world went through a great change!Monsters started appearing in reality, and a message from the game "Prophecy Online" appeared in front of his eyes. While everyone was shocked and frightened, Rei, who knew about every strategy and information in the game beforehand, realized, "This is my chance…!""I will turn this power into money!" Fearless in the face of money, his exciting solo run and money-making adventure begins now!